fst commit

Author: yanue

README.md

@@ -0,0 +1,81 @@
+-- 写入文件
+local function writefile(filename, info)
+    local wfile=io.open(filename, "w") --写入文件(w覆盖)
+    assert(wfile)  --打开时验证是否出错		
+    wfile:write(info)  --写入传入的内容
+    wfile:close()  --调用结束后记得关闭
+end
+
+-- 检测路径是否目录
+local function is_dir(sPath)
+    if type(sPath) ~= "string" then return false end
+
+    local response = os.execute( "cd " .. sPath )
+    if response == 0 then
+        return true
+    end
+    return false
+end
+
+-- 检测文件是否存在
+local file_exists = function(name)
+    local f=io.open(name,"r")
+    if f~=nil then io.close(f) return true else return false end
+end
+
+local area = nil
+local originalUri = ngx.var.uri;
+local originalFile = ngx.var.file;
+local index = string.find(ngx.var.uri, "([0-9]+)x([0-9]+)");  
+if index then 
+    originalUri = string.sub(ngx.var.uri, 0, index-2);  
+    area = string.sub(ngx.var.uri, index);  
+    index = string.find(area, "([.])");  
+    area = string.sub(area, 0, index-1);  
+
+    local index = string.find(originalFile, "([0-9]+)x([0-9]+)");  
+    originalFile = string.sub(originalFile, 0, index-2)
+end
+
+-- check original file
+if not file_exists(originalFile) then
+    local fileid = string.sub(originalUri, 2);
+    -- main
+    local fastdfs = require('restyfastdfs')
+    local fdfs = fastdfs:new()
+    fdfs:set_tracker("112.124.106.166", 22121)
+    fdfs:set_timeout(1000)
+    fdfs:set_tracker_keepalive(0, 100)
+    fdfs:set_storage_keepalive(0, 100)
+    local data = fdfs:do_download(fileid)
+    if data then
+       -- check image dir
+        if not is_dir(ngx.var.image_dir) then
+            os.execute("mkdir -p " .. ngx.var.image_dir)
+        end
+        writefile(originalFile, data)
+    end
+end
+
+-- 创建缩略图
+local image_sizes = {"80x80", "800x600", "40x40", "60x60"};  
+function table.contains(table, element)  
+    for _, value in pairs(table) do  
+        if value == element then
+            return true  
+        end  
+    end  
+    return false  
+end 
+
+if table.contains(image_sizes, area) then  
+    local command = "gm convert " .. originalFile  .. " -thumbnail " .. area .. " -background gray -gravity center -extent " .. area .. " " .. ngx.var.file;  
+    os.execute(command);  
+end;
+
+if file_exists(ngx.var.file) then
+    --ngx.req.set_uri(ngx.var.uri, true);  
+    ngx.exec(ngx.var.uri)
+else
+    ngx.exit(404)
+end

lua/fastdfs.lua

@@ -0,0 +1,64 @@
+-- 检测路径是否目录
+local function is_dir(sPath)
+    if type(sPath) ~= "string" then return false end
+
+    local response = os.execute("cd " .. sPath)
+    if response == 0 then
+        return true
+    end
+    return false
+end
+
+-- 文件是否存在
+function file_exists(name)
+    local f = io.open(name, "r")
+    if f ~= nil then io.close(f) return true else return false end
+end
+
+-- 获取文件路径
+function getFileDir(filename)
+    return string.match(filename, "(.+)/[^/]*%.%w+$") --*nix system
+end
+
+-- 获取文件名
+function strippath(filename)
+    return string.match(filename, ".+/([^/]*%.%w+)$") -- *nix system
+end
+
+--去除扩展名
+function stripextension(filename)
+    local idx = filename:match(".+()%.%w+$")
+    if (idx) then
+        return filename:sub(1, idx - 1)
+    else
+        return filename
+    end
+end
+
+--获取扩展名
+function getExtension(filename)
+    return filename:match(".+%.(%w+)$")
+end
+
+-- 开始执行
+-- ngx.log(ngx.ERR, getFileDir(ngx.var.file));
+
+local gm_path = '/usr/local/bin/gm'
+
+-- check image dir
+if not is_dir(getFileDir(ngx.var.file)) then
+    os.execute("mkdir -p " .. getFileDir(ngx.var.file))
+end
+
+-- 如果原始文件存在,则缩放(以最小边)
+if (file_exists(ngx.var.request_filepath)) then
+    local cmd = gm_path .. ' convert ' .. ngx.var.request_filepath
+    cmd = cmd .. " -resize " .. ngx.var.img_width .. "x" .. ngx.var.img_height
+    cmd = cmd .. " +profile \"*\" " .. ngx.var.file;
+    ngx.log(ngx.ERR, cmd);
+    os.execute(cmd);
+    ngx.exec(ngx.var.uri);
+else
+    ngx.exit(ngx.HTTP_NOT_FOUND);
+end
+